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Microchip Technology AT27BV020-90JU
- Part No.:
- AT27BV020-90JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27BV020-90JU.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,448
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Product details
Overview
AT27BV020-90JU from Atmel is a 2-Mbit (256K × 8) one-time programmable EPROM with 90 ns read access time, dual-voltage operation (2.7–3.6 V or 4.5–5.5 V), and industrial temperature range (−40°C to +85°C). It features CMOS/TTL-compatible I/O, rapid programming (100 µs/byte), and JEDEC-standard PLCC-32 packaging - ideal for battery-powered portable systems requiring low-power, unregulated supply operation.
For engineers reviewing the AT27BV020-90JU datasheet, AT27BV020-90JU pinout, AT27BV020-90JU application, or AT27BV020-90JU equivalent, this page delivers verified electrical specs, JEDEC-compliant package details, standby current (<20 µA), AC timing parameters (tACC = 90 ns), and real-world OTP EPROM selection guidance for embedded firmware storage and legacy system upgrades.
Technical Context
The AT27BV020-90JU implements a two-line control architecture (CE/OE) enabling bus contention avoidance in shared-memory systems. Its dual-supply design supports both unregulated 2.7–3.6 V battery rails and standard 5 V ±10% operation, with TTL-level outputs at 3.0 V compatible with 5 V logic interfaces.
It uses a rapid programming algorithm with 100 µs/byte pulses at VCC = 6.5 V and VPP = 13.0 V, and integrates product identification code (Manufacturer ID = 0x1E, Device ID = 0x86) for automated programmer recognition. Standby current remains below 20 µA (CMOS mode) at VCC = 3.6 V, and ESD protection exceeds 2,000 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (256K × 8) - supports full 8-bit data bus interface without multiplexing |
| Read Access Time | 90 ns max - enables direct connection to 10 MHz microcontrollers without wait states |
| Supply Voltage Range | 2.7–3.6 V or 4.5–5.5 V - eliminates need for voltage regulators in mixed-supply systems |
| Standby Current | 20 µA max at VCC = 3.6 V - extends battery life in always-on portable devices |
| Active Power Dissipation | 29 mW max at 5 MHz / VCC = 3.6 V - reduces thermal load in dense PCB layouts |
| Programming Speed | 100 µs/byte typical - cuts firmware update time by >5× vs. legacy 5 V EPROMs |
| Operating Temperature | −40°C to +85°C - qualified for industrial control and automotive under-hood auxiliary modules |
Pinout & Package
AT27BV020-90JU is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 compliant, with 1.27 mm pitch and 12.32 mm × 14.86 mm body dimensions. Pin 1 identifier is a corner notch on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A9 used for product ID voltage sensing during identification mode |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; outputs drive TTL levels at VCC = 3.0 V, compatible with 5 V logic families |
| CE | Chip Enable | Active-low chip select; controls device activation and high-impedance output state during standby |
| OE | Output Enable | Active-low output gate; allows multiple devices on same data bus without external bus transceivers |
| PGM | Program Strobe | Active-low pulse input triggering byte programming; requires precise 95–105 µs width at VPP = 13.0 V |
| VCC | Power Supply | Primary supply pin; must be applied simultaneously with or before VPP during programming |
| VPP | Programming Voltage | 13.0 V ±0.25 V programming supply; internally isolated from VCC during read mode |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling per device |
| NC | No Connect | Unbonded pin; must remain floating - no external connection permitted |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage read operation | Eliminates voltage translation circuitry when interfacing with both 3.3 V microcontrollers and 5 V peripheral logic |
| Rapid programming algorithm | Reduces field firmware burn time by minimizing verification cycles - critical for high-volume manufacturing test |
| Integrated product ID code | Enables automatic device detection in universal programmers, preventing incorrect algorithm selection and programming failures |
| 2,000 V HBM ESD rating | Supports safe handling in non-ESD-controlled assembly environments without additional protection components |
| JEDEC-standard PLCC-32 footprint | Ensures drop-in compatibility with existing AT27C020-based PCBs and socket infrastructure |
Applications
| Industrial Control Firmware Storage | Legacy System ROM Replacement |
|---|---|
Use Scenario: Storing boot code and configuration tables in programmable logic controllers (PLCs) operating from 3.3 V unregulated battery backup. IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic 90 ns read latency for real-time interrupt response. Use Value: Eliminates need for external LDO regulation while maintaining <20 µA standby draw - extends backup runtime beyond 10 years. |
Use Scenario: Upgrading obsolete 5 V AT27C020-based medical diagnostic equipment to support modern low-power supply rails. IC Role / Device Role / Timing Role: Pin- and function-compatible OTP EPROM replacement preserving original PCB layout and firmware toolchain. Use Value: Maintains identical JEDEC timing and programming flow while reducing active power by 80% at 3.3 V operation. |
| Portable Test Equipment Boot ROM | Automotive Diagnostic Module Memory |
Use Scenario: Holding calibration data and self-test routines in handheld multimeters powered by single-cell Li-ion batteries (2.7–3.6 V). IC Role / Device Role / Timing Role: Low-voltage OTP memory with TTL-compatible outputs driving 5 V microcontroller address/data latches. Use Value: Enables direct interface to legacy 5 V logic without level shifters - simplifies BOM and improves signal integrity. |
Use Scenario: Storing vehicle-specific diagnostic protocol stacks in OBD-II scan tools deployed across −40°C to +85°C ambient conditions. IC Role / Device Role / Timing Role: Industrial-grade OTP EPROM delivering guaranteed tACC ≤ 90 ns across full temperature range. Use Value: Ensures reliable firmware fetch timing even during cold-cranking events where supply sags to 2.7 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-90JU | 5 V-only operation (4.5–5.5 V); no 2.7–3.6 V support; identical pinout, timing, and programming interface | Requires regulated 5 V supply; unsuitable for battery-powered or dual-voltage systems | Select only if system lacks low-voltage capability and legacy 5 V infrastructure is fixed |
| MX29LV020TC-90G | Flash-based (reprogrammable), 3 V-only (2.7–3.6 V), 90 ns access, but requires erase-before-write and different command set | Enables field firmware updates; incompatible with EPROM programmers and boot ROM hardware designs | Choose for upgradability needs - not for drop-in EPROM replacement |
Compared with AT27C020-90JU, the AT27BV020-90JU adds true low-voltage operation without sacrificing speed or compatibility; versus MX29LV020TC-90G, it offers simpler programming infrastructure and guaranteed write-once behavior for tamper-resistant firmware deployment.
Availability
AT27BV020-90JU is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy system ROM replacement, portable test equipment boot ROM, and automotive diagnostic module memory requiring stable component supply and long-term lifecycle assurance.
Supply support for AT27BV020-90JU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Atmel Corporation, now part of Microchip Technology, is a semiconductor innovator specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27BV020 belongs to Atmel's OTP EPROM product line, designed specifically for cost-sensitive, high-reliability firmware storage in systems where reprogrammability is unnecessary and supply voltage flexibility is critical.
FAQ
What is the maximum operating voltage for AT27BV020-90JU during read mode?
The AT27BV020-90JU supports two distinct read-mode supply ranges: 2.7 V to 3.6 V for low-voltage battery operation, and 4.5 V to 5.5 V for standard 5 V systems. Operation outside these ranges - including 3.7–4.4 V - is not specified and may result in unreliable read timing or increased standby current. The AT27BV020-90JU must never be operated at intermediate voltages.
Does AT27BV020-90JU require external VPP circuitry for normal read operation?
No. During normal read operation, the AT27BV020-90JU operates solely from VCC (2.7–3.6 V or 4.5–5.5 V); VPP is internally disconnected and may be tied to VCC or left floating. VPP = 13.0 V is required only during programming, and must be applied simultaneously with or after VCC and removed simultaneously with or before VCC to prevent latch-up. The AT27BV020-90JU includes internal isolation to ensure safe read-mode VPP handling.
Is AT27BV020-90JU pin-compatible with AT27C020-90JU?
Yes. The AT27BV020-90JU shares identical pinout, signal definitions, and JEDEC PLCC-32 mechanical dimensions with the AT27C020-90JU. All address, data, control, and power pins map one-to-one. However, AT27BV020-90JU adds dual-voltage functionality and lower standby current, making it a functional superset - not just a pin-compatible substitute.
What is the purpose of the PGM pin on AT27BV020-90JU?
The PGM pin on AT27BV020-90JU is an active-low programming strobe that initiates byte programming when pulsed for 95–105 µs at VPP = 13.0 V. It is unused during read or standby modes. Unlike flash memory, the AT27BV020-90JU does not use PGM for command sequences - each pulse directly programs one addressed byte. The AT27BV020-90JU requires no special programming voltage on PGM itself; only correct timing and VPP level are critical.
Can AT27BV020-90JU be used in systems requiring RoHS compliance?
Yes. The AT27BV020-90JU carries the "U" suffix denoting Atmel's green (Pb/Halide-free) packaging option, fully compliant with RoHS Directive 2011/65/EU. Its PLCC-32 package contains no lead, brominated flame retardants, or other restricted substances. This makes the AT27BV020-90JU suitable for export to EU, China, and other RoHS-regulated markets without material declaration exceptions.
AT27BV020-90JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V, 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27BV020-90JU FAQ
1.How can I place an order for AT27BV020-90JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV020-90JU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT27BV020-90JU reliable?
The price and inventory of AT27BV020-90JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV020-90JU is usually 5 days.
3.What payment methods are accepted for AT27BV020-90JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV020-90JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV020-90JU?
AT27BV020-90JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV020-90JU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT27BV020-90JU?
For technical support, including AT27BV020-90JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV020-90JU requirements.
6.How does Aetrix verify that AT27BV020-90JU is sourced from the original manufacturer or authorized distributors?
All AT27BV020-90JU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT27BV020-90JU meets industry standards.
7.What is the process for return or replacement of AT27BV020-90JU?
All AT27BV020-90JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV020-90JU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT27BV020-90JU part is unused and in its original packaging.
Return procedure for AT27BV020-90JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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